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23 May, 17:36

Simplify (7x + 2 + 8x

4

) - (2x - 5 - 8x

4

) + (3x + 5x

4

)

A. 15x

4

+ 14x + 7

B. 21x

4

+ 8x + 7

C. 21x

4

+ 14x + 7

D. 15x

4

+ 19x + 7

+3
Answers (1)
  1. 23 May, 17:44
    0
    (7x + 2 + 8x^4) - (2x - 5 - 8x^4) + (3x + 5x^4)

    = 7x + 2 + 8x^4 - 2x + 5 + 8x^4 + 3x + 5x^4

    = 8x + 7 + 21x^4

    = 21x^4 + 8x + 7
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